US2698365A - Resiliently impelled speed responsive switch - Google Patents

Resiliently impelled speed responsive switch Download PDF

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Publication number
US2698365A
US2698365A US322706A US32270652A US2698365A US 2698365 A US2698365 A US 2698365A US 322706 A US322706 A US 322706A US 32270652 A US32270652 A US 32270652A US 2698365 A US2698365 A US 2698365A
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United States
Prior art keywords
speed
liquid
rotary element
container
blades
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US322706A
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English (en)
Inventor
James K Gaylord
Lewis E Thatcher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gaylord Products Inc
Original Assignee
Gaylord Products Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gaylord Products Inc filed Critical Gaylord Products Inc
Priority to US322706A priority Critical patent/US2698365A/en
Application granted granted Critical
Publication of US2698365A publication Critical patent/US2698365A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/06—Switches operated by change of speed
    • H01H35/10—Centrifugal switches

Definitions

  • This; invention relates to irnprovements in a rotary speedresponsive" electric switch' and refers particularly to an electricswitchwhich, in response to a' predetermined rotary" speed oi a' body; will break-a main orrelaycircuit to produce a-signal;control a predeterminedoperation or the like;
  • A'rotating body' is positi'onedabove the pool and carries one or more cantilever or blade springs, which, when the body is stationary. or moving. at a relatively low speed, dip into the pool'and make electrical'contact with the, metal plate.
  • the spring member onmembers, together. withthe plate may comprise. the switch points or electrodes of an electric switch connected in a suitable control, or signahcireuit to,be: actuatedor' deactuated'when the body reaches said predetermined rotary speed;
  • Fig. l is a sectional elevation of the r device comprising the present invention.
  • Fig. 2 is a transverse sectional view taken on line 22 of Fig. 1.
  • the device comprising the invention may include a housing 1 which may be cored or bored to provide a central cylindrical recess 2, a transverse recess 3, a lateral recess 4 and a bottom recess 5.
  • the transverse recess 3, at one end may open into the lateral recess 4 and at the opposite end may open to one lateral side of the housing 1.
  • the recess 2 and recess 3 may intersect in the body of the housing 1 and a continuation 6 of the recess 2 may open into the bottom recess 5.
  • a bearing 7 is positioned at the end of recess 3 and functions as a bearing for a shaft 8 which may be positioned in the recess 3.
  • a closure member 9 may be positioned over the mouth of the lateral recess 4 and may cgrry a bearing ring 10 adapted for the support of sha t
  • the present invention is adapted to function as a detector of rotary speed, being adapted to complete or break an electric circuit to produce an audible or visual signal or to start or stop a predetermined operation.
  • the rate of rotation of shaft 8 may be proportional to the rate of rotation of some related machine or body or may be proportional to the translatory or rectilinear speed of a machine or body wherein a predetermined function, operation or signal is to be produced when the rotating body or the rectilinearly moving body reaches a predetermined velocity.
  • the means for rotating the shaft 8 is] not shown; but: its is understood-abet theshafh will betoper -atively connected; tobanyndevice. whose:.oppra-s. tion is to I be controllpdsor aboutswhich a given. ,speedriofirotationor travel'iis totbemoted,
  • bevel gear 14a is i mounted HPQHJShfifIQ 8 :andtisarigidly secured thereto. by means of) set! screw. 15.
  • A. container 17, constructed oft-arr electrical insulating: material such. as-hard -rubber,;.plastic resinorrth'e like,- is. mounted upon thebottornportiorr of the housing;- 1 and forms a closure for recess 5;".
  • a conicalflrecessa181 is-provid'edi in, the outer portion of thecontamer. 1H 1 andis adapted to receive-the :conical. tip: oia seti screw 'l-9lwhich is threadedly positioned inthe centralportion of a U- shaped bracket-20.
  • Arms 21 of the br acket- 20-carryscrews 221 which: may engageopposite sides of the housing 1 to secure the container firmly in position upon the;
  • a metal ring or plate 23 is mounted uponthebottornof the' -container 1 7" and iselectrically connected toa jumper 24 which extends through the bottom of thecontainer;
  • A- conductor: 2'5 connects the-jumper 24eto electrical instrumentality: 26 which', turn; may be connected to battery 27 or other source-of;electrie-power'by means of conductor-"28.
  • the opposite;side-'ofijthepower source-27 maybeconnected to-th'e body of h'ousing l by means of conductor29.
  • the gear 16 may comprise a depending disk-portion-30;
  • the critical speed at which the blades 31 break contact with the plate 23 may be controlled by selecting springs of desired resiliency, or increasing or decreasing the area of said blades particularly the portion thereof which contacts the liquid 33.
  • the critical speed may also be controlled by the proper selection of viscosity of the liquid 33, which preferably comprises a non-conducting oil.
  • the shaft may be coupled to any rotating or rectilinearly moving body the speed of which determines the action which is to be controlled by the signal 26.
  • the shaft 8 may be rotated proportionately higher or lower than the critical driving device, that is, it may be geared upwardly or downwardly.
  • the gears 14 and 16 may be so related as to step up or step down the speed of the critical driving device and thus the control exercised by the device 26 may take place over a Wide variety of speeds.
  • a hollow boss 34 may extend upwardly from the bottom of the container 17 and a restricted end portion 35 of shaft 13 may extend thereinto for support.
  • the gear 16 and disk 30 may be supported by the upper portion of the boss 34 or said gear and disk may be supported upon the spring blades 31.
  • each blade may be insulated from the disk 30 and may be connected by means of slip rings or the like (not shown) to separate circuits wherein the plate 23 will form a common return.
  • the spring blades may be of different resiliency, area, or weight wherein they may break their respective circuits at different speeds of the disk 30.
  • the free end portions of the blades 31 may be coated with mercury, as may also the upper surface of the plate 23, to secure better electrical contact between the blades and the plate, or, if desired, a pool of mercury (not shown) may be disposed immediately above the plate 23 and below the surface of the liquid 33 in which the blade ends may dip and with which the blades may break contact at a predetermined speed.
  • the gear 16 and disk 30 preferably rotate in a horizontal plane, that is, about a vertical axis. However, it has been found that the entire device can be canted through a relatively small angle and yet it will function eificiently.
  • An electric switch responsive to the rotary speed of a body which comprises, a container, an electrically conductive member carried in the container, an electrically non-conductive liquid carried in the container in contact with and above the conductive member, a rotary element positioned above said liquid, a resilient metal blade se cured at one end to the bottom of said rotary element with the free end thereof extending downwardly into said liquid and in resilient contact with said electrically conductive member when said rotary element is stationary, means for rotating said rotary element in timed relationship with the rotation of said body whereby said blade is resiliently deflected by the frictional force of said liquid thereon and breaks contact with said conductive member when said rotary element reaches a predetermined speed, and means for connecting the resilient blade and the electrically conductive member to opposite sides of an electrical circuit.
  • An electric switch responsive to the rotary speed of a body which comprises, a container constructed of insulating material, a metal plate carried in the container, a pool of electrically non-conductive liquid carried in the container in contact with and above the metal plate, a rotary element positioned above said liquid, a resilient metal blade secured at one end to the bottom of said rotary element with the free end thereof extending down-- wardly into said liquid and in resilient contact with said metal plate when said rotary element is stationary, means for rotating said rotary element in timed relationship with the rotation of said body whereby said blade is resiliently deflected by the frictional force of said liquid thereon and breaks contact with said metal plate when said rotary element reaches a predetermined speed, and means for connecting the resilient blade and the metal plate to opposite sides of an electrical circuit.
  • An electric switch responsive to the rotary speed of a body which comprises, a container, an electrically conductive member carried in the container, a pool of electrically non-conductive liquid carried in the container in contact with and above the conductive member, a rotary element positioned above said liquid, a resilient metal blade fixed at one end to the bottom of said rotary element with a free end portion thereof extending downwardly into said liquid and in resilient contact with said electrically conductive member when said rotary element is stationary, means for rotating said rotary element in timed relationship with the rotation of said body, said free end portion being disposed in trailing relationship to the fixed end portion thereof when said element rotates whereby said blade is resiliently deflected upwardly by said liquid and breaks contact with said conductive member when said rotary element reaches a predetermined speed, and means for connecting the resilient blade and the electrically conductive member to opposite sides of an electrical circuit.
  • An electric switch responsive to the rotary speed of a body which comprises, a container, an electrically conductive member carried in the container, a pool of electrically non-conductive liquid carried in the container in contact with and above the conductive member, a rotary element positioned above said liquid, a plurality of circumferentially spaced resilient metal blades each secured at one end to the bottom of said rotary element with the free ends thereof extending downwardly into said liquid and in resilient contact with said electrically conductive member when said rotary element is stationary, means for rotating said rotary element in timed relationship with the rotation of said body, whereby said blades are resiliently deflected by said liquid and break contact with said conductive member when said rotary element reaches a predetermined speed, and means for connecting the resilient blades and the electrically conductive member to opposite sides of an electrical circuit.
US322706A 1952-11-26 1952-11-26 Resiliently impelled speed responsive switch Expired - Lifetime US2698365A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US322706A US2698365A (en) 1952-11-26 1952-11-26 Resiliently impelled speed responsive switch

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US322706A US2698365A (en) 1952-11-26 1952-11-26 Resiliently impelled speed responsive switch
GB27888/54A GB754691A (en) 1954-09-27 1954-09-27 Improvements in or relating to speed-responsive electric switches

Publications (1)

Publication Number Publication Date
US2698365A true US2698365A (en) 1954-12-28

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ID=10266901

Family Applications (1)

Application Number Title Priority Date Filing Date
US322706A Expired - Lifetime US2698365A (en) 1952-11-26 1952-11-26 Resiliently impelled speed responsive switch

Country Status (4)

Country Link
US (1) US2698365A (fr)
CH (1) CH328230A (fr)
FR (1) FR1112509A (fr)
GB (1) GB754691A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270317A (en) * 1963-11-06 1966-08-30 Alfred Fetz Brake light switch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258545A (en) * 1959-06-03 1966-06-28 Orland W Phillips Reel assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US726125A (en) * 1902-03-06 1903-04-21 Albert Wetzel Speed indicating and regulating apparatus.
US2109732A (en) * 1936-08-15 1938-03-01 Scovill Manufacturing Co Motor speed controller
US2518478A (en) * 1942-05-16 1950-08-15 Everard F Kohl Centrifugal fluid governor
US2584983A (en) * 1949-05-04 1952-02-12 Sperry Sun Well Surveying Co Centrifugally operated switch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US726125A (en) * 1902-03-06 1903-04-21 Albert Wetzel Speed indicating and regulating apparatus.
US2109732A (en) * 1936-08-15 1938-03-01 Scovill Manufacturing Co Motor speed controller
US2518478A (en) * 1942-05-16 1950-08-15 Everard F Kohl Centrifugal fluid governor
US2584983A (en) * 1949-05-04 1952-02-12 Sperry Sun Well Surveying Co Centrifugally operated switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270317A (en) * 1963-11-06 1966-08-30 Alfred Fetz Brake light switch

Also Published As

Publication number Publication date
GB754691A (en) 1956-08-08
CH328230A (de) 1958-02-28
FR1112509A (fr) 1956-03-15

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